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Side-by-side financial comparison of Quest Diagnostics (DGX) and Simon Property Group (SPG). Click either name above to swap in a different company.

Quest Diagnostics is the larger business by last-quarter revenue ($2.9B vs $1.8B, roughly 1.6× Simon Property Group). Simon Property Group runs the higher net margin — 197.6% vs 9.7%, a 187.9% gap on every dollar of revenue. On growth, Simon Property Group posted the faster year-over-year revenue change (13.2% vs 9.2%). Over the past eight quarters, Simon Property Group's revenue compounded faster (11.4% CAGR vs 9.9%).

Quest Diagnostics Incorporated is an American clinical laboratory. A Fortune 500 company, Quest operates in the United States, Puerto Rico, Mexico, and Brazil. Quest also maintains collaborative agreements with various hospitals and clinics across the globe.

Simon Media Properties, LLC, doing business as Simon Property Group, Inc., is an American real estate investment trust that invests in shopping malls, outlet centers, and community/lifestyle centers. It is the largest owner of shopping malls in the United States and is headquartered in Indianapolis, Indiana. As of December 31, 2024, it owned interests in 232 properties.

DGX vs SPG — Head-to-Head

Bigger by revenue
DGX
DGX
1.6× larger
DGX
$2.9B
$1.8B
SPG
Growing faster (revenue YoY)
SPG
SPG
+4.1% gap
SPG
13.2%
9.2%
DGX
Higher net margin
SPG
SPG
187.9% more per $
SPG
197.6%
9.7%
DGX
Faster 2-yr revenue CAGR
SPG
SPG
Annualised
SPG
11.4%
9.9%
DGX

Income Statement — Q1 FY2026 vs Q4 FY2025

Metric
DGX
DGX
SPG
SPG
Revenue
$2.9B
$1.8B
Net Profit
$281.0M
$3.5B
Gross Margin
Operating Margin
15.4%
49.7%
Net Margin
9.7%
197.6%
Revenue YoY
9.2%
13.2%
Net Profit YoY
12.0%
358.7%
EPS (diluted)
$2.24
$9.34

Green = leading value per metric. Periods may differ when fiscal calendars don't align.

8-Quarter Revenue & Profit Trend

Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.

Revenue
DGX
DGX
SPG
SPG
Q1 26
$2.9B
Q4 25
$2.8B
$1.8B
Q3 25
$2.8B
$1.6B
Q2 25
$2.8B
$1.5B
Q1 25
$2.7B
$1.5B
Q4 24
$2.6B
$1.6B
Q3 24
$2.5B
$1.5B
Q2 24
$2.4B
$1.5B
Net Profit
DGX
DGX
SPG
SPG
Q1 26
$281.0M
Q4 25
$245.0M
$3.5B
Q3 25
$245.0M
$702.7M
Q2 25
$282.0M
$643.7M
Q1 25
$220.0M
$477.9M
Q4 24
$222.0M
$771.8M
Q3 24
$226.0M
$546.7M
Q2 24
$229.0M
$569.4M
Gross Margin
DGX
DGX
SPG
SPG
Q1 26
Q4 25
32.4%
Q3 25
33.7%
Q2 25
34.2%
Q1 25
32.5%
Q4 24
32.7%
Q3 24
32.6%
Q2 24
33.5%
Operating Margin
DGX
DGX
SPG
SPG
Q1 26
15.4%
Q4 25
13.8%
49.7%
Q3 25
13.7%
50.8%
Q2 25
15.9%
49.7%
Q1 25
13.0%
49.4%
Q4 24
13.8%
52.8%
Q3 24
13.3%
51.9%
Q2 24
14.8%
51.7%
Net Margin
DGX
DGX
SPG
SPG
Q1 26
9.7%
Q4 25
8.7%
197.6%
Q3 25
8.7%
43.9%
Q2 25
10.2%
43.0%
Q1 25
8.3%
32.4%
Q4 24
8.5%
48.8%
Q3 24
9.1%
36.9%
Q2 24
9.6%
39.0%
EPS (diluted)
DGX
DGX
SPG
SPG
Q1 26
$2.24
Q4 25
$2.18
$9.34
Q3 25
$2.16
$1.86
Q2 25
$2.47
$1.70
Q1 25
$1.94
$1.27
Q4 24
$1.95
$2.04
Q3 24
$1.99
$1.46
Q2 24
$2.03
$1.51

Balance Sheet & Financial Strength

Snapshot of each company's liquidity, leverage and book value from the latest quarter.

Metric
DGX
DGX
SPG
SPG
Cash + ST InvestmentsLiquidity on hand
$393.0M
$823.1M
Total DebtLower is stronger
$5.7B
$28.4B
Stockholders' EquityBook value
$7.7B
$5.2B
Total Assets
$16.7B
$40.6B
Debt / EquityLower = less leverage
0.74×
5.46×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
DGX
DGX
SPG
SPG
Q1 26
$393.0M
Q4 25
$420.0M
$823.1M
Q3 25
$432.0M
$1.6B
Q2 25
$319.0M
$1.2B
Q1 25
$188.0M
$1.4B
Q4 24
$549.0M
$1.4B
Q3 24
$764.0M
$2.5B
Q2 24
$271.0M
$2.5B
Total Debt
DGX
DGX
SPG
SPG
Q1 26
$5.7B
Q4 25
$5.2B
$28.4B
Q3 25
$5.2B
$25.8B
Q2 25
$5.2B
$25.4B
Q1 25
$5.9B
$24.8B
Q4 24
$5.6B
$24.3B
Q3 24
$5.6B
$25.4B
Q2 24
$3.8B
$25.3B
Stockholders' Equity
DGX
DGX
SPG
SPG
Q1 26
$7.7B
Q4 25
$7.2B
$5.2B
Q3 25
$7.3B
$2.3B
Q2 25
$7.2B
$2.5B
Q1 25
$6.9B
$2.6B
Q4 24
$6.8B
$2.9B
Q3 24
$6.8B
$2.7B
Q2 24
$6.6B
$2.9B
Total Assets
DGX
DGX
SPG
SPG
Q1 26
$16.7B
Q4 25
$16.2B
$40.6B
Q3 25
$16.2B
$33.6B
Q2 25
$16.0B
$33.3B
Q1 25
$15.8B
$32.5B
Q4 24
$16.2B
$32.4B
Q3 24
$16.1B
$33.3B
Q2 24
$13.9B
$33.4B
Debt / Equity
DGX
DGX
SPG
SPG
Q1 26
0.74×
Q4 25
0.72×
5.46×
Q3 25
0.71×
10.98×
Q2 25
0.72×
10.36×
Q1 25
0.85×
9.50×
Q4 24
0.83×
8.25×
Q3 24
0.83×
9.37×
Q2 24
0.58×
8.59×

Cash Flow & Capital Efficiency

How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.

Metric
DGX
DGX
SPG
SPG
Operating Cash FlowLast quarter
$278.0M
$1.2B
Free Cash FlowOCF − Capex
$948.8M
FCF MarginFCF / Revenue
53.0%
Capex IntensityCapex / Revenue
3.9%
14.2%
Cash ConversionOCF / Net Profit
0.99×
0.34×
TTM Free Cash FlowTrailing 4 quarters
$3.2B

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
DGX
DGX
SPG
SPG
Q1 26
$278.0M
Q4 25
$465.0M
$1.2B
Q3 25
$563.0M
$890.3M
Q2 25
$544.0M
$1.2B
Q1 25
$314.0M
$827.2M
Q4 24
$464.0M
$1.1B
Q3 24
$356.0M
$892.9M
Q2 24
$360.0M
$1.1B
Free Cash Flow
DGX
DGX
SPG
SPG
Q1 26
Q4 25
$307.0M
$948.8M
Q3 25
$419.0M
$685.0M
Q2 25
$436.0M
$971.3M
Q1 25
$197.0M
$597.0M
Q4 24
$341.0M
$867.7M
Q3 24
$250.0M
$706.5M
Q2 24
$268.0M
$874.8M
FCF Margin
DGX
DGX
SPG
SPG
Q1 26
Q4 25
10.9%
53.0%
Q3 25
14.9%
42.8%
Q2 25
15.8%
64.8%
Q1 25
7.4%
40.5%
Q4 24
13.0%
54.8%
Q3 24
10.0%
47.7%
Q2 24
11.2%
60.0%
Capex Intensity
DGX
DGX
SPG
SPG
Q1 26
3.9%
Q4 25
5.6%
14.2%
Q3 25
5.1%
12.8%
Q2 25
3.9%
16.3%
Q1 25
4.4%
15.6%
Q4 24
4.7%
13.8%
Q3 24
4.3%
12.6%
Q2 24
3.8%
12.9%
Cash Conversion
DGX
DGX
SPG
SPG
Q1 26
0.99×
Q4 25
1.90×
0.34×
Q3 25
2.30×
1.27×
Q2 25
1.93×
1.89×
Q1 25
1.43×
1.73×
Q4 24
2.09×
1.41×
Q3 24
1.58×
1.63×
Q2 24
1.57×
1.87×

Financial Flow Comparison

Revenue → gross profit → operating profit → net profit for each company.

Revenue Breakdown by Segment

DGX
DGX

Segment breakdown not available.

SPG
SPG

Real Estate Segment$1.7B95%
Other$86.3M5%

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